JPH0534319U - Bearing sealing plate - Google Patents
Bearing sealing plateInfo
- Publication number
- JPH0534319U JPH0534319U JP091470U JP9147091U JPH0534319U JP H0534319 U JPH0534319 U JP H0534319U JP 091470 U JP091470 U JP 091470U JP 9147091 U JP9147091 U JP 9147091U JP H0534319 U JPH0534319 U JP H0534319U
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- sealing plate
- grease
- lubricant
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
- F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
- F16C33/7846—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with a gap between the annular disc and the inner race
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
(57)【要約】
【目的】 軸受内のグリ−スが外側に滲み出すことを確
実に防止しグリ−ス等の潤滑剤が磁気ディスク媒体に付
着してコンタミネ−ションを生じることのない軸受の密
封板を提供すること。
【構成】 軸受の一方の軌道輪（外輪２）に固定され、
他方の軌道輪（内輪３）との間にラビリンス密封部６を
形成する潤滑剤を封入した軸受の密封板において、前記
密封板１の表面部を前記潤滑剤とは親和性の悪いフッ素
樹脂でコ−ティングしたことを特徴とする。
(57) [Abstract] [Purpose] A bearing that reliably prevents the grease in the bearing from seeping out, and prevents lubricant such as grease from adhering to the magnetic disk medium and causing contamination. Providing a sealing plate. [Structure] Fixed to one bearing ring (outer ring 2) of the bearing,
In a bearing sealing plate in which a lubricant forming a labyrinth sealing portion 6 is sealed between the other bearing ring (inner ring 3), the surface portion of the sealing plate 1 is made of a fluororesin having a poor affinity with the lubricant. It is characterized by being coated.
Description
【０００１】[0001]
この考案は、例えばハ−ドディスクドライブ（以下、ＨＤＤとする）装置のロ −タリ−アクチュエ−タ用軸受で用いられている密封板、より詳しくは軸受内の グリ−ス等の潤滑剤が外部へ滲み出さないようにした軸受の密封板に関する。 This invention proposes, for example, a sealing plate used in a bearing for a rotary actuator of a hard disk drive (hereinafter referred to as HDD) device, more specifically, a lubricant such as grease in the bearing. The present invention relates to a bearing sealing plate that does not leak outside.
【０００２】[0002]
ＨＤＤロ−タリ−アクチュエ−タ用軸受は軸受の側面が直接ＨＤＤ装置内の空 間に露出した構造となっている。このようなＨＤＤ装置では高速回転するディス ク記録媒体に磁気ヘッドを浮上させるが、浮上量は極く僅かの量でありこれらの 間に塵塵が付着すると正常な動作が出来なくなる。従って塵埃の進入は極力防止 しなければならない。塵埃としては軸受内から滲み出るグリ−ス等の潤滑剤があ るが、このグリ−ス滲出防止用のベアリング構造としては特開平２−７８０６９ 号で開示されているように、軸受を嵌着する軸周囲及び軸受シ−ルに揆油材料を コ−ティングしたものが知られている。また上記するようにグリ−スの滲出自体 を防止し且つ摩擦係数を小さくするものとして特開昭５６−９４０２８号で開示 されたものが知られている。 The HDD rotary actuator bearing has a structure in which the side surface of the bearing is directly exposed in the space inside the HDD device. In such an HDD device, the magnetic head is levitated on a disk recording medium that rotates at a high speed, but the levitating amount is extremely small, and if dust adheres between them, normal operation cannot be performed. Therefore, ingress of dust must be prevented as much as possible. As the dust, there is a lubricant such as grease that exudes from the inside of the bearing. As a bearing structure for preventing this exudation of grease, the bearing is fitted as disclosed in JP-A-2-78069. It is known that the oily material is coated around the shaft and the bearing seal. Further, as disclosed in JP-A-56-94028, it is known that the grease itself is prevented from seeping out and the friction coefficient is reduced.
【０００３】[0003]
上記するように磁気ディスク装置内の磁気ディスク記録媒体と磁気ヘッドとの 間に塵埃が付着しないようにするため軸受を嵌着する軸周囲及び軸受シ−ルに揆 油材料をコ−ティングしたものは必ずしも滲出防止とならない場合もある。例え ばグリ−スとこの揆油材料との間に親和性があると滲出する可能性は否定出来な いし、組合せによっては滲出を促進する可能性もある。この考案はかかる課題に 鑑みてなされたものであり、その目的とする所は軸受内のグリ−スが外側に滲み 出すことを確実に防止しグリ−ス等の潤滑剤が磁気ディスク媒体に付着してコン タミネ−ションを生じることのない軸受の密封板を提供することにある。 As described above, a bearing is fitted around the shaft and the bearing seal is coated with an oil-refining material to prevent dust from adhering between the magnetic disk recording medium and the magnetic head in the magnetic disk drive. May not always prevent exudation. For example, there is an undeniable possibility that exudation will occur if there is an affinity between the grease and this palm oil material, and depending on the combination, exudation may be accelerated. The present invention has been made in view of the above problems, and its purpose is to reliably prevent the grease in the bearing from seeping out to the outside, and the lubricant such as grease adheres to the magnetic disk medium. Another object of the present invention is to provide a bearing sealing plate that does not cause contamination.
【０００４】[0004]
即ち、この考案は、軸受の一方の軌道輪に固定され、他方の軌道輪との間にラ ビリンス密封部を形成する潤滑剤を封入した軸受の密封板において、密封板の表 面部を前記潤滑剤とは親和性の悪いフッ素樹脂でコ−ティングしたことを特徴と する。 That is, this invention is a bearing sealing plate fixed to one bearing ring of a bearing and containing a lubricant forming a labyrinth sealing portion between the other bearing ring and the bearing ring. The agent is characterized by being coated with a fluororesin having a poor affinity.
【０００５】[0005]
この考案にかかる軸受の密封板１は以上のような手段としたので、グリ−スが 密封板１と外輪２との隙間から外部へ滲出しようとしたり、シ−ル固定用溝２ａ に滲み出たグリ−スがあっても密封板１外周部の斜面部１ａ、１ｂに触れると撥 ねてはじかれ、該グリ−スは軸受外部へ滲出することは無くなる。 Since the sealing plate 1 of the bearing according to the present invention has the above-mentioned means, the grease tries to exude to the outside through the gap between the sealing plate 1 and the outer ring 2 or exudes to the seal fixing groove 2a. Even if there is grease, it will be repelled and repelled by touching the slopes 1a, 1b on the outer peripheral portion of the sealing plate 1, and the grease will not exude to the outside of the bearing.
【０００６】[0006]
以下、この考案の具体的実施例について図面を参照して説明する。 図１はこの考案にかかる軸受の密封板１を嵌め込んだ軸受の断面図である。こ の実施例では外輪２と内輪３との間に保持器４で保持されたボ−ル５を配置する と共に潤滑剤（グリ−ス）を封入してある。そしてこれら軌道輪の両外側に密封 板１、１を嵌め込み内部のグリ−スが滲出しないようにしてある。この場合外輪 ２側にシ−ル固定用溝２ａを設け内輪３側にラビリンス密封部６を設けてあるが 、前記密封板１は外輪２側で固定する。但し、密封板１は内輪３側で固定し、外 輪２側との間にラビリンス密封部を形成しても良い。 Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a bearing in which a sealing plate 1 of the bearing according to the present invention is fitted. In this embodiment, a ball 5 held by a cage 4 is arranged between the outer ring 2 and the inner ring 3 and a lubricant (grease) is enclosed. The sealing plates 1 and 1 are fitted on both outer sides of these races so that the grease inside does not seep out. In this case, a seal fixing groove 2a is provided on the outer ring 2 side and a labyrinth sealing portion 6 is provided on the inner ring 3 side, but the sealing plate 1 is fixed on the outer ring 2 side. However, the sealing plate 1 may be fixed on the inner ring 3 side and a labyrinth sealing portion may be formed between the sealing plate 1 and the outer ring 2 side.
【０００７】 図２はこの考案で使用される密封板１の軸方向断面図である。使用材料は金属 材でも良いし合成樹脂材でも良いが、外輪２のシ−ル固定用溝２ａに嵌め込む時 にはある程度径方向に弾性変形可能な寸法に加工する。該密封板１の外周部は二 つの斜面１ａと１ｂを形成するよう加工する。そして一方の斜面部１ａは外輪２ のシ−ル溝２ａに接触させるように嵌め込み、他方の斜面部１ｂはシ−ル溝２ａ 内の空間２ｂに面するように嵌め込む。FIG. 2 is an axial sectional view of the sealing plate 1 used in the present invention. The material used may be a metal material or a synthetic resin material, but when it is fitted into the seal fixing groove 2a of the outer ring 2, it is processed to a size that allows elastic deformation in the radial direction to some extent. The outer peripheral portion of the sealing plate 1 is processed to form two slopes 1a and 1b. Then, one slope portion 1a is fitted so as to contact the seal groove 2a of the outer ring 2, and the other slope portion 1b is fitted so as to face the space 2b in the seal groove 2a.
【０００８】 次に、前記密封板１にはフッ素樹脂をコ−ティングするが、図３はそのコ−テ ィング方法を示す図である。即ち、多数の密封板１を軸７に嵌めて通して重ね外 周部の斜面部１ａと１ｂにフッ素樹脂をスプレ−コ−ティングする。このように 軸７に通して重ねスプレ−コ−ティングすれば効率的でありコストダウンとも成 る。この場合、コ−ティングするフッ素樹脂としてはポリテトラフルオロエチレ ン（ＰＴＦＥ）、テトラフルオロエチレン−エチレン共重合体（ＥＴＦＥ）、ポ リふっ化ビニル（ＰＶＦ）、テトラフルオロエチレン−ペルフルオロアルキルビ ニルエ−テル共重合体（ＰＦＡ）等が用いられる。前記密封板１には表面全体を コ−ティングしても良い。尚、外輪２と内輪３との間に充填されるグリ−スは密 封板１外側に触れた時、撥ねてはじけさせるため前記各フッ素樹脂とは親和性の 悪いグリ−スでなければならない。このようなグリ−スとしては、特開昭５８− １８５６９３号公報記載のグリ−スが好適に使用される。このグリ−スは、増ち ょう剤としてジウレア系を使用し、これに基油として合成油（ポリαオレフィン ）に鉱油を加えたものである。Next, the sealing plate 1 is coated with a fluororesin, and FIG. 3 is a view showing the coating method. That is, a large number of sealing plates 1 are fitted on the shaft 7 and passed through, and a fluororesin is spray-coated on the inclined surface portions 1a and 1b of the overlapping outer peripheral portion. In this way, if the spray coating is performed through the shaft 7, it is efficient and the cost is reduced. In this case, as the fluororesin to be coated, polytetrafluoroethylene (PTFE), tetrafluoroethylene-ethylene copolymer (ETFE), polyvinyl fluoride (PVF), tetrafluoroethylene-perfluoroalkyl vinyl ether A tercopolymer (PFA) or the like is used. The entire surface of the sealing plate 1 may be coated. The grease filled between the outer ring 2 and the inner ring 3 must be a grease that has a poor affinity with each of the fluororesins in order to repel when it touches the outside of the sealing plate 1. . As such a grease, the grease described in JP-A-58-185693 is preferably used. This grease uses a diurea-based thickener as a thickener, to which a synthetic oil (poly α-olefin) as a base oil and mineral oil are added.
【０００９】 図４は図１の一部拡大図である。この考案にかかる軸受の密封板１には以上の ように軸受の軌道輪の間に充填されるグリ−スと親和性の悪いフッ素樹脂をコ− ティングしたので、グリ−スが密封板１と外輪２との隙間から外部へ滲出しよう としたり、シ−ル固定用溝２ａに滲み出たグリ−スがあっても密封板１外周部の 斜面部１ａ、１ｂに触れると撥ねてはじかれ、該グリ−スは軸受外部へ滲出する ことは無くなる。FIG. 4 is a partially enlarged view of FIG. As described above, the bearing sealing plate 1 according to the present invention is coated with the fluororesin, which has a poor affinity with the grease filled between the bearing races as described above. Even if there is grease leaking out from the gap with the outer ring 2 or if there is grease leaking into the seal fixing groove 2a, it will be repelled and repelled if it touches the slopes 1a, 1b on the outer peripheral portion of the sealing plate 1, The grease does not seep out of the bearing.
【００１０】[0010]
この考案にかかる軸受の密封板は以上詳述したような構成としたので、このよ うな密封板をＨＤＤ装置等のような機器類の軸受に使用し潤滑剤によるコンタミ ネ−ションを防止することが出来る。また、この考案にかかる軸受の密封板にフ ッ素樹脂をコ−ティングする場合、効率的に行うことが出来るのでコスト低減に も寄与することが出来る。 Since the sealing plate of the bearing according to the present invention has the structure described in detail above, it is necessary to use such a sealing plate for bearings of equipment such as HDD devices to prevent contamination by lubricant. Can be done. Further, when the fluorine resin is coated on the sealing plate of the bearing according to the present invention, it can be efficiently performed, which can contribute to cost reduction.
【図１】この考案にかかる軸受の密封板を嵌め込んだ軸
受の断面図である。FIG. 1 is a sectional view of a bearing in which a sealing plate of the bearing according to the present invention is fitted.
【図２】この考案で使用される密封板の軸方向断面図で
ある。FIG. 2 is an axial sectional view of a sealing plate used in the present invention.
【図３】この考案の密封板にフッ素樹脂をコ−ティング
方法を示す図である。FIG. 3 is a view showing a method of coating a fluororesin on the sealing plate of the present invention.
【図４】図１の一部拡大図である。FIG. 4 is a partially enlarged view of FIG.
１ 密封板 １ａ、１ｂ 密封板の外側斜面 ２ 外輪 ２ａ シ−ル溝 ２ｂ
シ−ル溝空間 ３ 内輪 ４ 保持器 ５ ボ−ル ６ 密封部 ７ 軸（スプレ−コ−ティング用）1 Sealing plate 1a, 1b Outer slope of the sealing plate 2 Outer ring 2a Seal groove 2b
Seal groove space 3 Inner ring 4 Retainer 5 Ball 6 Sealing part 7 Shaft (for spray coating)
Claims (1)
軌道輪との間にラビリンス密封部を形成する潤滑剤を封
入した軸受の密封板において、密封板の表面部を前記潤
滑剤とは親和性の悪いフッ素樹脂でコ−ティングしたこ
とを特徴とする軸受の密封板。1. A bearing sealing plate fixed to one bearing ring of a bearing and containing a lubricant forming a labyrinth sealing portion between the bearing ring and the other bearing ring, the surface portion of the sealing plate being the lubricant. Is a bearing sealing plate characterized by being coated with a fluororesin having poor affinity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP091470U JPH0534319U (en) | 1991-10-11 | 1991-10-11 | Bearing sealing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP091470U JPH0534319U (en) | 1991-10-11 | 1991-10-11 | Bearing sealing plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0534319U true JPH0534319U (en) | 1993-05-07 |
Family
ID=14027283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP091470U Pending JPH0534319U (en) | 1991-10-11 | 1991-10-11 | Bearing sealing plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0534319U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002339999A (en) * | 2001-05-17 | 2002-11-27 | Koyo Seiko Co Ltd | Rolling bearing |
| JP2015206399A (en) * | 2014-04-18 | 2015-11-19 | 株式会社ジェイテクト | rolling bearing device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0278069A (en) * | 1988-09-14 | 1990-03-19 | Hitachi Ltd | Bearing structure |
-
1991
- 1991-10-11 JP JP091470U patent/JPH0534319U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0278069A (en) * | 1988-09-14 | 1990-03-19 | Hitachi Ltd | Bearing structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002339999A (en) * | 2001-05-17 | 2002-11-27 | Koyo Seiko Co Ltd | Rolling bearing |
| JP2015206399A (en) * | 2014-04-18 | 2015-11-19 | 株式会社ジェイテクト | rolling bearing device |
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